I'm with sdebrango on this one. I've never heard of eggs in bechamel, but bechamel is a mother sauce so it's a foundation for other things. I'll guess why your bechamel is lumpy (because my sister called me with the same question in the past). First of all you need to take your time with your roux, whisking the flour into the butter. The other thing my sister was doing was adding cold milk all at once and everything would seize up. The milk needs to be heated to where it's just scalded and whisked in gradually. It's actually hard to fix after it has seized.

I was following a recipe from Michael Psilakis [ How to Roast a Lamb: New Greek Cooking] who asserts that traditional Greek bechamel contains eggs; however, he uses a less traditionally Greek bechamel for his spanakopita, which does not contain eggs and is probably similar to the versions of bechamel with which you are familiar. I did add warm milk, and ultimately the sauce lumps disappeared when the sauce was fully blended with the spinach cheese mixture. Next time I will add the milk even more slooooowly. That might be where things went wrong -- but I am glad that recipe is self correcting.

When did you,add the eggs? Could it be the eggs wound up cooking too quickly if you put them in an already warm/hot sauce? Only once have I ever had anything that was bechamel/egg based... The mother in law cooked it as part of a "lighter" Christmas dinner... It turned out as leeks in scrambled egg, and really wasn't a winner....

When I do a Béchamel (with egg) for the Hot Brown recipe, I make sure the ingredients are close to room temp--the milk, the eggs, the cheese--before I begin. I temper the eggs off-stove with about 2 cups of the hot ingredients (added slowly), before I add the eggs to the stove mixture, and it seems to work fine.

Hi everybody, I usually don't have a problem with lumpy bechamel, was making Greek lasagna (pastitsio), and yikes! lumpy bechamel, I did save it with the hot water, per one of the answers. Came out awsome, to answer the question about putting eggs in the bachamel, I cool it a bit whip in eggs and pour over the (pastitsio), that's the Greek recipe, when it comes out of the oven you have a luscious, creamy,cheesy light brown layer of bechamel! Almost like a souffle!!!!! Out of this world!

I make my bechamel out of corn starch,and it is 100%lumpy free if you heat up the milk and butter to a boil but add the corn starch mixed with some water at room temperature and stir while it thickens.I add parmesan or nutmeg now and then but had never heard of the egg thing...live and learn!